3Com 3812 Getting Started Guide - Page 23

The Power-up Sequence, Powering-up the Switch, Checking for Correct Operation of LEDs - self test

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The Power-up Sequence 23 The Power-up Sequence The following sections describe how to get your Switch powered-up and ready for operation. Powering-up the Use the following sequence of steps to power-up the Switch. Switch 1 Plug the power cord into the power socket at the rear of the Switch. 2 Plug the other end of the power cord into your power outlet. The Switch powers-up and runs through its Power On Self Test (POST), which takes approximately 1 minute. Checking for Correct During the Power On Self Test, all ports on the Switch are disabled and Operation of LEDs the LEDs light in a rapid sequence. When the POST has completed, check the Unit Status to make sure that your Switch is operating correctly. Table 6 shows possible colors for the LED. Table 6 Unit Status Colors Color Green Yellow Off State The Switch is powered-up and operating normally. The Switch has failed its Power On Self Test (POST). The Switch is not receiving power. If there is evidence of a problem, see "Solving Problems Indicated by LEDs" on page 46 for a list of suggested solutions. CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is by connecting or disconnecting the power cord. Connecting a Redundant Power Supply (Switch 3848 only) You can connect a SuperStack 3 Advance Redundant Power System to the Switch 3848. This unit, which is also known as RPS, is designed to maintain the power to your Switch if a power supply failure occurs. For normal redundancy, the unit requires a Type 3 Power Module (part number 3C16075)

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The Power-up Sequence
23
The Power-up
Sequence
The following sections describe how to get your Switch powered-up and
ready for operation.
Powering-up the
Switch
Use the following sequence of steps to power-up the Switch.
1
Plug the power cord into the power socket at the rear of the Switch.
2
Plug the other end of the power cord into your power outlet.
The Switch powers-up and runs through its Power On Self Test (POST),
which takes approximately 1 minute.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light in a rapid sequence.
When the POST has completed, check the Unit Status to make sure that
your Switch is operating correctly.
Table 6
shows possible colors for the
LED.
Table 6
Unit Status Colors
If there is evidence of a problem, see
“Solving Problems Indicated by
LEDs”
on
page 46
for a list of suggested solutions.
CAUTION:
The Switch has no ON/OFF switch; the only method of
connecting or disconnecting mains power is by connecting or
disconnecting the power cord.
Connecting a
Redundant Power
Supply (Switch 3848
only)
You can connect a SuperStack 3 Advance Redundant Power System to
the Switch 3848. This unit, which is also known as RPS, is designed to
maintain the power to your Switch if a power supply failure occurs.
For normal redundancy, the unit requires a Type 3 Power Module (part
number 3C16075)
Color
State
Green
The Switch is powered-up and operating normally.
Yellow
The Switch has failed its Power On Self Test (POST).
Off
The Switch is not receiving power.